Turn off bluetooth when not using

[safeinOhio]

Hackers got me. Went out and bought a hard wired key board and plugged in my printer direct.

[PJMcK]

1. What happened?

If you don't mind my asking.

[safeinOhio]

2. Started to slow down with

lots of beach balls. Then my scrolling went crazy, rolling down without touching it. Googled it and tried turning off Bluetooth and back to normal. Key board was my only need for it, so bought a $19 hard connected one.

[Auggie]

3. Where was this ... home or public?

[safeinOhio]

4. Home

iMac on cable router.

[RocRizzo55]

7. Was the computer

directly wired to the cable modem?
If so you need to get a wireless router.
You also need to have antivirus-antimalware software on your Mac.
Yes, they can get infected.

[cwydro]

6. Yikes.

Thanks for this info.